Sewing-machine motor



G. C. MARX. sewmc MACHINE MOTOR.

APPLICATION FILED SEPT. 30,- 1915.

Patentpd Feb. 22, 1921.

' A TTOR/VEY TATE GUSTAVE C. MARX, 0F ELIZABETH, NEW JERSEY, A$SIGNOR TO DIEHL MANUFAU- TUBING (30., 0F ELIZABETH, NEW JERSEY, A CORPORATION OF NEW JERSEY.

SEWING-MACHINE MOTOR.

Specification of Letters Patent.

Patented Feb. 22, 1921.

To all whom it may concern:

Be it known that I, GUs'rAvE C. MARX, a citizen of the United States, residing at Elizabeth, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in. Sewing-Miachine Motors, of which the following is a specification, reference being bad therein to the accompanying drawings. i

This invention relates to sewing machine motors.

Une object of the invention is to provide an improved support for a sewing machine motor.

Another object is to provide improved means for pivotally supporting the motor upon that portion of the sewing machine frame which is above the bed plate.

Another object is to provide a support for the motor which may be fixed to apart of the sewing machine frame and which will permit the motor to be moved in at least two planes from its operative position to an inoperative position where it will be entirely out of the way.

Other objects will appear as the specification proceeds.

The invention is illustrated in the accompanying drawings, in which- Figure 1 is a rear elevation of the upper portion of a sewing machine to the frame of whichis attached the improved motor support and motor.

F Fig. 2 is a plan of the structure shown in Fig. 3 is an end elevation of the structure shown in Fig. 1 with the balance wheel removed.

Fig. 4 is an enlarged transverse sectional view of a portion of the sewing machine frame with the motor support applied thereto.

Fig. 5 is a plan of the motor support with the parts in inoperative or motor-retracted position.

Fig. 6 and Fig. 7 is a detail sectional view of one of the interlocking connections between the sections of the support.

In its preferred form the support is constructed in the form of a two part bracket of which one section is constructed as a base member with a cover plate rigidly secured to the frame as a closure for the access openis a partial sectional View of Fig. 5,

ing in the hollow arm. The other section of the bracket, to which the motor is rigidly secured, is mounted upon the base member by a connecting eie-ment having angularly disposed pivotal pins journale'd in'the respective bracket sections to form a connection between the two that will, permit movement of the motor from operative position to an inoperative position under the arm of the sewing machine head. The motor supporting section is formed with ton es adapted to enter grooves or slots in the asesection in which they are adapted to be maintained by gravity to confine the motor in either its operative or inoperative position.

In the operative position of the motor it is so sustained that a grooved friction wheel upon its shaft rests upon the balance or driving wheel of the sewing machine. In the inoperativeposition of the motor it is maintained beneath the lateral member or arm of the sewing machine head where it is entirely out of the way and will not interfere with placing a cover over the sewing machine head or dropping the head if the sewing machine be of the drop-head type.

That part of the sewing machine structure above the bed plate 1, commonly known as the head, comprises in general a hollow standard 2 with the lateral tubular arm 3 in which is journaled the shaft 4 carrying at its rearward end the driving or balancewhcel 5. The standard 2 has in its rear side at its junction with the arm 3 the usual aperture 6 (Fig. 4) for access to the parts within the arm.

The motor is preferably of electricallydriven type and comprises the frame 7 of usual or suitable form in which is journaled the armature-shaft 8 carrying the grooved friction-wheel: 9 which preferably has an operative face formed by a cork band or ring adapted to rest upon androll in contact with the driving wheel 5. The motor receives its electric current through the cable 10 leading into an aperture in the frame 7, as usual.

The motor-frame 7 is secured by means of fastening screws 11 upon a concaved seat afforded by the upper or outerface of the plate 12 at one end of the arm 13 whose other end is formed with a fork 14 which embraces a swivel-block 15 to which it is ivoted by means of the transverse pin 16.

he block 15 constitutes the head of a secwasher 21 and nut 22 by means 0 which the pin is held in position in its aperture. The plate 12 and arm 13 constltute the motorsupporting section of the motor-bracket of which the other section comprises the arm 19' and cover-plate 2Q.

As represented partlcularly in Fig. 4, the

cover-plate 20 is attached to the frame at the top by means of a' screw 23 and at the bottom by a screw 24 tapped mto the anglepiece 25 between which and" the ad acent mar inal portion of the plate 20 the margina wall of the opening 6 1s thus securely clamped.

The plate 12 is provided at one end with vthe depending tongue 26 which 1s adapted to enter a slot 27 in the laterallug 28 upon the cover-plate 20 when the motor is in operative position, as re resented in full lines in Figs. 1 to 4, with its friction-wheel 9 in rolling contact with the driving wheel rim 5. As will be observed, the horizontal fulcrum-pin 16 of the motor-supporting arm 13 permits the motor to descend freely by gravity for engagement of the frictionwheel 9 with the driving wheel 5, and the pressure of these parts is regulated by means of the stop-screw 29 which is tapped into the car 30 projecting from the lug 28 with its point serving as a rest for the lower face of the motor-supporting plate 12, as represented in Figs. 1 and 4. The stop-screw 29 is provided with the usual jam-nut 31 to hold it against turning.

When the machine is not in use, the motor may be shifted from its full-line position above the arm 3 and at the rear of the standard-2 to its retracted position beneath the arm 3, as represented in dotted lines in Figs. 1 and 2. i In performing this shift, the motor is turned to the right about the fulcrumpin 16 to bring it close to the bedlate 1, after which it is swung beneath t e arm 3 upon the vertical fulcrum-pin 17, a tongue ,or rib 32 upon the arm 13 entering the groove 33 of the arm 19, as represented particularly in Figs. 6 and 7 to provide a positive lock for holding the motor in retracted position.

It is evidentl immaterial to the present im rovement w at types of sewing machine an motor be em loyed, and it is equally evident that-the orm and arrangement of component parts of the motor-bracketmay be materially modified within the sco' eof the invention. While in the present em odiment of the improvement use is made of a joint comprising pivotal pins disposed in to its interior and having journ angular relation, other suitable forms of oint may be employed if desired.

Having thus set forth the nature of the invention; what I claim herein is 1. The combination with a sewing machine frame of a bracket, a supporting arm pivoted, thereto, a motor carried by said arm, said arm being capable of swinging movement in at least two planes to move the motor bodily to or from its operative position, and locking means for confining said arm in two'positions corresponding to the operative and inoperative positions of the motor.

2. The combination with a sewing ma,- chine frame of a bracket, a supporting arm pivoted thereto and a motor carried by'said arm, said arm being capable of a swinging movement about a horizontal axis and about a vertical axis to move the motor to and from its operative position.

- 3. The combination with a sewing machine, of a motor, a bracket for supporting the motor in either its operative or inoperative position, said bracket comprising a motor supporting section and a base sect-ion, and aconnectin element provided with angularly dispose pivotal pins journaled respectivel in said sections of which one is journale in the supporting section and the other in the base section to permit movement, of the motor supporting section in at least two planes to move the motor to and from its operative position, and interlocking'means provided upon said sections for maintaining them in difieren't predetermined relative positions.

4. In combination with a motor-frame, a.

adapted to be maintained in interlocking relation 'by gravity.

5. The combination with a sewing machine frame constructed with a hollow member formed with an openingl for access a ed therein a shaft carrying a driving wheel, of a motor-bracket comprising a base member formed with a cover-plate for said opening of the sewing machine frame having means for rigidly securing it to the latter, a mo: tor-supporting member sustaining a motor comprising'a shaft having a friction-wheel adapted for engagement with said driving wheel, said supportin member havin a pivotal connection wit the base mem er whereby in one position of the supporting member the motor friction-wheel is sustained b gravity in o erative relation with the drivmg wheel, an means for confining said supporting member movably in oper-- ative position.

6. The combination with a sewing machine having the usual frame structure above the bed plate of a bracket adapted to be attached to said frame structure, and means for movably supporting a motor from said bracket so that the same may be moved in at least two planes from drivin position to a position under the arm of sai frame structure.

7. A bracket adapted to be attached to a sewing machine frame having an arm, said bracket having a motor supporting arm movable in at least two planes so that the motor may be moved from a driving position to a position beneath the arm of the sewin machine frame.

8. he combination with a sewing machine, of a motor, a bracket for supporting the motor in either its 0 erative or inoperative position, said brac et comprising a base section and a motor supporting section pivotally connected thereto and permitting movement of the motor to and from its operative position, and interlocking means provided on said section for maintaining them in different predetermined relative positions.

9. A bracket adapted to be attached to a sewing machine frame and to support a motor in either its operative or inoperative position, said bracket comprising a base section adapted to be attached to the sewing machine frame, a motor supporting section pivotally connected to the base section and adapted to permit movement of the motor to and from its operative position, and interlocking means provided upon said sections for maintaining them in different predetermined relative positions.

In testimony whereof, I have signed my name to this specification.

GUSTAVE C. MARX. 

